Linux Shell

推荐格式：

#!/bin/bash
predir=`pwd` # 脚本运行目录
dir=`dirname $0` # 脚本所在目录
cd "${dir}"

# do your work

cd "$predir"

Case用法

case "$1" in
    start)
        sh /path/to/your/code/startup.sh
        ;;
    stop)
        sh /path/to/your/code/shutdown.sh
        ;;
    restart)
        sh /path/to/your/code/shutdown.sh
        sleep 10
        sh /path/to/your/code/startup.sh
        ;;
    *)
        echo "Usage: $0 (start|stop|restart)"
esac

判断空字符串：

if [ -n "$comment" ]:then
    git add --all .
    git commit -m "$comment"
    git push origin master
else
    # empty
    echo "nothing modified"
fi